"Here's to all who watched, and all who were part of its creation, but most of all, here's to you @joss grrr,aargh," Head wrote, referring to the classic Mutant Enemy logo at the end of each episode.

Buffy herself, Sarah Michelle Gellar, has yet to post about the milestone day, but we're pretty sure she'll pay tribute to the show in due course.

To mark the 20th anniversary, Spike actor James Marsters spoke to Digital Spy about the show's legacy and revealed that he'd be up for a reunion on one condition: "If Joss Whedon is helming it, in a heartbeat."